Improvement in mechanical movements



'r. o. PERRY. MECHANICAL MOVEMENT.

Patented. Feb. 29,1878.

WITNE S 8%;

N-PETERS. FNOTO UTHUGRAPHEiL WASHINGTON. DV (3.

UNI-TED S A-res PATENT OFFICE.

THOMAS O. PERRY, OF TECUMSEH, ASSIGNOR OF ONE-HALF HIS RIGHT TO FRANKLINW. DIOKEY, OF MARSHALL, MIOHIGAN.

IMPROVEMENT IN MECHANICAL MOVEMENTS V Specification forming part ofLetters Patent No. 174,088, dated Eebruary 29, 1876; application tiledNovember 13, 1875.

To all "whom it may concern:

Be it known thatI, THOMAS O. PERRY,- of Tecumseh, in the county ofLenawee and State of Michigan, have invented certain Improvements inMechanical Movements, of which the following is a specification Theobject of my invention is to obtain from a regular reciprocating orrotary motion a movement which shallbe reciprocating at intervals,controllable in either direction.

In the drawing, Figure 1 is a front view of my device. Fig. '2 is a sideelevation, and Fig. 3 is a plan of the piece V.

S andS are ordinary sheaves. To S is attached a ratchet-wheel, W, bothbeing loose on a pin supported at the upper end of the standard A. Oneend of the arm I is also loose on the pin, and to this arm is attached aratchet, 1, which works into the ratchet-wheel W. The sheave S isattached to the piece T, which may slide up or down on the standard A,and acts as a weight to tighten the chain or cord (1, which passesaround the sheaves S and S. To the standard A is bolted a block, I),through which passes a pin, 00, on which the piece V turns. V has twogrooves, u u, so placed that the cord 0 runs in them on both sides. Aknob, K, is attached to the cord 0.

Now, if a regular reciprocating movement be. given to the arm Z, thesheave S is made to rotate in one direction, imparting its motion to thecord 0, and when the knob K goes up on one-side, it turns the piece V inone direction, slips by, and when it comes down on the other side thepiece V is turned back again. Thus a reciprocating movement is impartedto V at intervals, which may be'varied in duration by shortening orlengthening the chain or cord G.

It the piece V is placed. midway between the sheaves S and S, it willturn with equal intervals in either direction; but if V is placed nearerto one sheave thanto the other, the intervals will be unequal.

Without using a ratchet, rotary motion may be directly imparted to thesheave S with the same result.

I claim as my invention- 1. The reciprocating piece V, constructed asshown and described, in combination with the sheaves S S, cord O, andknob K, as and r for the purpose herein set forth.

2. The piece V. in combination with the reciprocatin g arm l, ratchet r,ratchet-wheel W,

sheaves S S, cord 0, and knob K, to operate 7 substantially as and forthe purpose shown and described.

THOMAS O. PERRY.

Witnesses:

FRANKLIN W. DIcKEY, CHARLES BURRIDGE.

